I received a reply to get some zincs on here fast. Are you saying to sand it down and apply zinc chromate or what. I must do the repair myself and am a female, so please be a little more specific. I am a great fisherman, so I need my boat. I also can easily sand and spray paint.

I do not leave my boat in the water. I trailer my boat back and forth. I also ALWAYS hand wash my boat, trailer and fishing equipment when I return from a fishing trip. After the inside of the boat dries out I put my boat under the carport with a boat cover on it.

I do not know the brand of the boat hull. All it says on the outside is G-3 T 1860. I know it is all welded, no pop rivets. It is a heavy or maybe I should say thick skinned boat. I know when I bought it back in 2001 I felt it was one of the thickest skinned boats I had looked at and I looked at a bunch. When one of the guys come into work today they might know what brand it is.

Where I can see the problem is on the stearn. I was getting the boat ready to go out for some trout as everyone says fishing is great right now.The rest of the boat seems to be fine.

Welcome to AluminumAlloyBoats.com. Though I am not an expert. My suggestion is please take your fine vessel into FantaSea Marine 3405 US 98 South. The phone number to their service department is (863) 668-8015 Though I have never dealt with them, they are the closest G3 dealer in your area. They should be able to help you with your corrosion problem.

There was a fella here who just installed zincs on his small boat because of the same problem.....what was his name folks??

He properly installed them and was on his way.

Beleive me, I have a good charter customer with a G3 v-bow jon boat and I've told him about it too.

I'm talking a zinc like this attached to the boat (this is mine) I'm sure you could go with a tad smaller one.

You may want to do a little home work and reading up on the subject (world wide web) so you have a bit of a background to work with, as we are not professional educators...But I do know one and his name is Jay. (sorry Jay) It's all just part of boat ownership. we all been there.

The corrosion that you are getting in you transom is pretty common on thin alloy boats that have a wood transom with a skin of aluminum on the outside.
I believe what is happening is there is corrosion from the inside(between the wood and aluminum) working it's way out in different spots.
Don't worry, your transom won't fall apart or your boat won't sink.
At this point there will likely be more spots in the future.
Just keep an eye on your transom and repair as needed.

A few things you can do:
-Properly install a sacrificial zinc anode on your transom

-Make sure any added screws in the transom are bedded to make them water tight

You all are so GREAT!! All of the advice is great. I can weld the holes closed, as I can weld aluminum. Do you think I should protect the welds with the zinc chromate paint? I will try and read up on the zinc plates over the weekend and try to find some plates, as I do not think I will go fishing until I get this problem fixed. I have included the picture you asked for. The area on the inside affected with this corrison is a covered are filled with foam. You can see where they sprayed in the foam through the white hole you see. It is in the same spot on both sides.[img]http://i297.photobucket.com/albums ... .jpg[/img]

OK, Another thing to look at. Take one of those cheap little 12 volt testers(the ones with the sharp end and a light) and put the clip on the pos side of your battery and touch the other end to your hull. Did the light go on? If so your hull is connected to your 12 volt system and you need to correct it asap!! Metal boats need an isolated 12 volt system. That means that you CAN NOT use the hull as a ground. When the hull is connected to your battery youy hull will suffer!!!!! Everything on your boat must have two wires and you must take care to be sure the device isn't grounding to the hull. Sometimes just screwing down a light or pump will cause it to become connected(grounded out) to your hull and the problem will start.

For me it looks like pit corrosion, not a real "zincs-missing" one.
So my questions:
Is there anitfouling on that, i cannot recognize on the image.
Where on the boat is it exactly?
What other metal devices are in the water, connected to the boat?
Could the area has chafed on brass/steel/cupper parts below the waterline or on the trailer or on land or in a garage ?
Could there have been some metal lashing device for a long time out in wet weather?
Are you sure, those pits are only in this area?

A foto of the whole boat would be more helpful, everthing mounted, usually on board.